Study of preferential solvation in binary solvent mixtures by the fluorescence-detected magnetic field effect

Autor:	Nikolai Kh. Petrov, Michael V. Alfimov, V. N. Borisenko
Rok vydání:	1994
Předmět:	Solvent Hildebrand solubility parameter Molar volume Chemistry Solvation Analytical chemistry Polar Physical and Theoretical Chemistry Excimer Fluorescence Ion
Zdroj:	Journal of the Chemical Society, Faraday Transactions. 90:109
ISSN:	1364-5455 0956-5000
DOI:	10.1039/ft9949000109
Popis:	It has been found that the magnetic field effect detected by fluorescence of the pyrene–N,N-dimethylaniline exciplex in binary liquid mixtures containing components of significantly different relative permittivities depends on VmP(δP–δN)2 values which appear in Hildebrand's theory. Here VmP is the molar volume of a polar component and δP and δN are the solubility parameters of polar and non-polar components, respectively. The results suggest that the preferential solvation of radical-ion pairs in mixtures may be affected by their concentration fluctuations. The characteristic dimension of polar microdomains produced around radical ions was determined by the magnetic-field-effect technique to be ca. 50 A.
Databáze:	OpenAIRE
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